Achromadoridae Gerlach & Riemann, 1973

Gusakov, Vladimir A. & Gagarin, Vladimir G., 2017, An annotated checklist of the main representatives of meiobenthos from inland water bodies of Central and Southern Vietnam. I. Roundworms (Nematoda), Zootaxa 4300 (1), pp. 1-43 : 30

Family Achromadoridae Gerlach & Riemann, 1973

95. * Achromadora micoletzkyi (Stefanski, 1915) Micoletzky, 1925 — {23, 24, 27, 29, 31, 36} (11, 11, 8, 0; 8)

Population structure and abundance. At site 27—11 juveniles and 51 females (23 x10 3 /m2), at sites 24 and 31—2 to 5 juvenile individuals and 10 to 16 females, including those with eggs (4–7 x10 3 /m2), at the other sitesnot more than 5 juvenile specimens and females (up to 1 x10 3 /m 2 in the quantitative samples).

Ecology and distribution. Amphibiont. Prefers terrestrial biotopes but also occurs in water bodies. Cosmopolitan ( Andrássy 2005; Decraemer & Smol 2006). Not previously observed in Vietnam.

96. Achromadora ruricola (de Man, 1880) Micoletzky, 1925 — {28, 31} (0, 7, 0, 0; 3) Population structure and abundance. Single gravid female in each sample.

Ecology and distribution. Similar to the species described above. Cosmopolitan ( Andrássy 2005; Decraemer & Smol 2006). Collected in Vietnam many times ( Nguyen 2007).

97. * Achromadora cf. semiarmata Altherr, 1952 — {59} (0, 0, 8, 0; 1)

Population structure and abundance. Single female.

Ecology and distribution. Amphibiont. Found in terrestrial and freshwater habitats in some countries in Asia ( China), Europe, Africa, and South America and one of the Galapagos Islands ( Andrássy 2005; Decraemer & Smol 2006). First record for Vietnam.

Remarks. This female differs from the females of A. micoletzkyi in size and position of amphids ( Andrássy 2005). Study of males is necessary for reliable species identification.

98. Achromadora Cobb, 1913 spp.— {27, 65} (0, 4, 0, 9; 3)

Population structure and abundance. Female and female with egg of two different unidentified species.